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Biome vs Prettier for JavaScript

Prettier is the established formatter for many JavaScript projects. Biome is attractive when teams want fast formatting and linting from one toolchain.

Runs in your browser

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

No upload

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

No account

HappyFormatter tools process pasted snippets client-side for quick, privacy-first developer workflows.

Key differences

Biome can combine formatter and linter workflows.

Prettier has broad plugin and editor adoption.

Project conventions matter more than personal preference.

Messy JavaScript

Biome-style formatting makes object and array spacing easier to read.

const user={name:'Ada',roles:['admin','editor']};

Output

const user = { name: "Ada", roles: ["admin", "editor"] };

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